<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户登录</title>
</head>
<body>
    <h2>用户登录</h2>
    <form action="">
        用户名：<input type="text" name="username"><br>
        密  码：<input type="password" name="password"><br>
              <input type="button" value="提交">
    </form>

</body>
</html>